Devices gets disconnected or signedout to my plex server, have to resign in.

Hi!

I’ve got some problems with devices connected to my plex server. I have shared my plex to family memebers so that they can watch movies and other things on my plex server. But sometimes theirs devices, like smart-tv, Apple TV4 is sometimes signing out after i have confirmed their CODE in https://www.plex.tv/link/ that they getting and then i have to reconfirm to make them signed in to my server. It’s verry frustrating. i want their devices to be logged in like forever. Is someone getting this problem to? I cant find any solution.

When i watching the tab “devices” i can see their devices even though that they have been signed out. and have to re-enter their new access code in https://www.plex.tv/link